What Is the Trinity and the Holy Spirit By Bernard Piault and A.M. Henry Books / Hardcover Religion & Mythology › Catholicism Publisher: Hawthorn Books, January 1959 Price $12.51 Free Shipping Send to a friend Used - Good Good condition. The Library of Catholic Knowledge. 2nd printing. (Catholicism Catholic) $12.51 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.